Acceleration is measured in m/s².
Answer: m/s²
Answer:
The light used has a wavelenght of 4.51×10^-7 m.
Explanation:
let:
n be the order fringe
Ф be the angle that the light makes
d is the slit spacing of the grating
λ be the wavelength of the light
then, by Bragg's law:
n×λ = d×sin(Ф)
λ = d×sin(Ф)/n
λ = (3.2×10^-4 cm)×sin(25.0°)/3
= 4.51×10^-5 cm
≈ 4.51×10^-7 m
Therefore, the light used has a wavelenght of 4.51×10^-7 m.
We would only know that if we could see it.
So far, with the most sensitive astronomical instruments that have
been built, we don't see an end as far away as we can see.
The farthest (dimmest) objects we can see are something like
13-1/2 billion light years away.
